Three-tube heating recycling air-conditioning system control method and air-conditioning system

A technology of an air-conditioning system and a control method, applied in the field of air-conditioning, can solve problems such as blockage of pipelines, freezing, affecting system reliability, etc., and achieve the effect of preventing freezing and preventing freezing.

Active Publication Date: 2015-07-22
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing practice is to add a heat recovery device to the three-pipe multi-connected air-conditioning system, and use the waste heat of the air conditioner to make hot water. At present, the water heat exchangers used in the heat recovery device are mostly plate heat exchangers and casing heat exchangers. However, in some cold areas in the north, when the ambient temperature is lower than 0 degrees, the residual water in the water heat exchanger may freeze, block the pipeline, and affect the reliability of the system operation at the next startup

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  • Three-tube heating recycling air-conditioning system control method and air-conditioning system

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Embodiment Construction

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0032] Such as figure 1As shown, the three-pipe multi-connected air-conditioning system of the present invention includes an external unit system 34, a first cooling and heating switching device 20, a second cooling and heating switching device 21, an air-conditioning indoor unit system 35, a heat recovery device throttling component 25, A water heat exchanger 26, a water pump 27, an inlet water temperature sensor 28, and an outlet water temperature sensor 29. The external machine system 34 extends outwards from a first pipeline 31, a second pipeline 32, and a third pipeline 33. The first pipeline 31 is connected to the air-conditioning indoor unit system and the throttling part 25 of the heat recovery device respec...

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Abstract

The invention relates to a three-tube heating recycling air-conditioning system control method and an air-conditioning system. The three-tube heating recycling air-conditioning system control method includes the following steps that step 1, the inlet water temperature T1 and the outlet water temperature T2 of a water heat exchanger are detected in real time; step 2, the T1 and the T2 are compared with a set first low temperature t1, when the inlet water temperature T1 or the outlet water temperature T2 is smaller than or equal to the first low temperature t1, air-conditioning system heating is stated, and water in the water heat exchanger is heated; step 3, when it is detected the inlet water temperature T1 or the outlet water temperature T2 reaches the set high temperature t2, air-conditioning system heating is ended, and the air-conditioning system restores to the previous standby state. By means of the three-tube heating recycling air-conditioning system control method and the air-conditioning system, the situation that water in the water heat exchanger of a heat recycling device is frozen under the low temperature, and thus system operation reliability is affected can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method for a three-pipe heat recovery air conditioning system and an air conditioning system. Background technique [0002] At present, in order to improve the comfort of air conditioners, there may be different demands for cooling and heating in transitional seasons. For a single set of multi-connected air conditioning system, it must be able to meet the cooling and heating demands at the same time. In the prior art, three The controlled multi-connected air-conditioning system can meet this demand, and multiple indoor units can simultaneously turn on two different modes of cooling or heating. [0003] In the repeated refrigeration cycle of the air conditioner, the refrigerant will generate a lot of heat. If this part of the heat is fully utilized, it will have great significance in the field of energy saving in daily life. The existing practice is to add a he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F25B41/04F25B49/02F25B41/20F25B41/24
CPCF25B13/00F25B49/02F25B41/20
Inventor 卜其辉许永锋梁伯启蒋运鹏
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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